Device for locating a molten distributing-fuse.



F. SCHULTZ. DEVICE FOR LOOATING A MOLTEN DISTRIBUTING FUSE.

APPLICATION FILED PEB.15, 1907.

Patented Dec. 1, 1908.

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1H5 mamas PETERS an, WASHINGTON. n. c.

OFFICE.

FEREINAN'D- S'CHTTLTZ, OF GERMANY;

DEVICE FOR LOC 'ATTNG'A MOTLTENfiISTR'IFUTINfiFUSE.

Patented Dec. 1,1908.

Applicifidnfllod'lebruary 15,19071 Serial No; 367 ,5871

To all whom it may concern:

Be it known that I, FERDINAND SCHULTZ, a citizen of the German Empire, and residing at No. 48 Aegidiistrasse, Munster, Germany, have invented an Improved Device for Locating a Molten Distributing-F use, of which the following is a description.

The present invention relates to devices, by means of which it is easily possible to ascertain the place where a distributing fuse has fused and consists especially of the means and mode of giving the signal in question.

This invention may preferably be employed in electrical systems of distribution, in which the feeder is provided with pilot wires.

According to this invention the electrical connection between a feeder and the appertaining pilot wire is directly or indirectly disconnected by the voltaic arc of a melting fuse so that the place where the distributing fuse has fused may be ascertained at the station voltmeter without further ceremony.

The invention is illustrated in the accompanying drawing in which Figure 1 is a column, containing the switch-device, which serves as feeder for a three wire direct current system having earthed metal conductor. Fig. 2 is a diagram showing a modification of the invention.

n is a table of marble or other suitable material upon which the fuses 0 for a series of distribution-cables a and for the concentric feeder Z are mounted.

g is a casing, in which the cable end-piece of the feeder Z terminates and feeds the omnibus-rod of the said table it by means of a unction cable 1 leading to the terminal is.

The pilot wires 9, f of the feeder lead to the terminals m and e and pass to the central station through the terminals of the cableend-piece casing over the volt-meter-switch cl to the station voltmeters a and b, of which one pole each is earthed at c. A thin, preferably insulated wire a; is stretched over all the fuses of the table a at a small distance apart from the same and connected at m and A: with the terminals of the feeder or of the appertaining pilot-wire respectively. The said wire m may, of course, be arranged in any other suitable manner. Now, when a distributing fuse melts, the thin wire a: will owing to the luminous are also melt over the said molten fuse and consequently the connection between pilot-wire and feeder will be interrupted. If now the station voltmeter is put into connection with the said pilot-wire by means of the volt-meter-switch this will show the voltage 0, whereby the place, and if direct current is used, also the polarity of the said molten distributing fuse is shown. It may be mentioned here that the pilot wires in the feeders, which are just present, and voltmeters on the switch-table in the central station may be used for the purpose in question, but it is evident that also special wire-lines and measuring instruments may serve the same purpose.

Fig. 2 shows a modification of the invention. The spring-contact h, 2' is closed by a stretched, non-conductive thread j of easily combustible material. This thread passes closely over the single fuses and is burned by the luminous arc of a melting fuse. Thereby a power medium 1' (spring-gravity or the like) will separate the contacts h, 2' and simultaneously the feeder and pilot wire connected with the same, so that as already explained, the place of the molten fuse may be ascertained at the central station.

I claim as my invention 1. In a device for locating a blown fuse in the distributing circuit, the combination of a feeder and pilot wire, a fuse in the circuit of feeder and pilot wire adapted on melting to disconnect electrical connection between the said feeder and pilot wire and means for locating the blown out fuse by the voltmeter at the central station substantially as described.

2. In a device for locating a blown fuse in the distributing circuit, the combination of a switch plate, a series of fuses thereon, distributing cables connected with the said fuses, a feeder also connected with the said fuses, a casing to receive the cable-endpieces of the said feeder, terminals and pilot wires leading from the feeder to the said terminals, voltmeters and a voltmeter switch, a circuit breaking device in connection with the said series of fuses and connected with the terminals of the said feeder and the appertaining pilot wires respectively and means for locating the fuse burned out at the central station, substantially as described.

3. In a device for locating a blown fuse in the distributing circuit, the arrangement of a switch plate, a series of fuses arranged upon the said switch-plate, distributing cables, connected with the said fuses, a

feeder also connected with the said fuses, a

wires respectively, and means for indicating the fuse-melting place at the central station,

casing for receiving the cable-end-pieces of substantially as described.

the said feeder, terminals, pilot wires, leading from the feeder to the said terminals, voltmeters, a voltmeter-switch, a thin wire suitably stretched over the said series of fuses and connected with the terminals of the said feeder and the appertaining pilot- In testimony whereof I afiix my signature in the presence of two Witnesses.

FERDINAND SCHULTZ. [L.s.] Witnesses:

O'r'ro KEjNIG, J. A. RITTERSHAUS. 

